Elevator control mechanism



W. 5. ATKINSON Y' ELEVATOR GQNTROLv MECHANISM Filed Apr. 29, 1921 5sheets-sheet 1 Feb. 27, 19m

Ez Gf@ @@4221 fr INVENTOR. 75%,# Q. BY M 5f. @5w

* ATTORNEY 3i@ mi@ 37 Feb. 27, N231 \N. 5. ATKINSON` ELEVAI'IIOR CONTROLMECHANISM 5 sheets-sheet 2 Filed Apr. 29, 1921 INVENTOR. m ffm; .W

BY w @M ATTORNEY Feb. 27, w23, i Lmm W. S. ATKINSON ELEVATOR CONTROLMECHANISM Filed Apr, 29, 1921 5 sheets-sheet 5 INVENTOR.

BY M553@ y A TTORNEY.

l is pevided with eontiois, 'Whei'eiw l e .veig lor u higfjhe l cornesil in apparatus of the sind claimed. e vufious is eil embodiments of indie lovetionel view of' uontiol zip- 7 inten.4

S im p v of the s. sind addition e plain view of switch structuie oiledtiiei'ehy.

p' :E is un end eleva'ionzil view of the ich eiieiui'e of he e ndiug'iemmutie View of one ol' of our diving and eonti'ollim` o unich myinvention is applica- L ziginentaiy plan view, partly in weiifiui. oitof ihe Stuciiii'e olf Figi. 5. i" ie e diagrammatic view olf' one oiei'oiiil: :1 iiiinggeinents "irih `which my ble. Y

o p 1. ,i o inolisive, l is a 'hivh efe e-iiiied the poets oi oiovidedwith hearings; for

the shaft fl upon wiiioh is secured the sheave or Wheel 5., oveil whichpasses Jche safety 'faible G. Upmi Vthe shaft -l is'seouifed 'the bevel7 'meshing with end dniving the hevel X'Izu 8 secured upon Jshe`governor shalt l0 haii g' a hearing 9 carried by one of the poste 2,'Chiouoh which it extends vertically. it the uppei' end o'l the governorshaft l0 thoi'e :we pivoted at ll 'he iuins 12, l2 carrying at hei'ioutei' ends the governor helle or Weighte 13, 13. Pivoted to the :winel2 at M, l: are he links l5, l5, pivote/Ci at 76., 1G to the sleeve 1Tmovzihie longitudinally of the shaft l0. Clo-acting Wi'h "che sleeve 17is the non-rotating Collin' 1S mov- :ihle longitudinally of the Shaft l0Wih lie s Pivoied to Jrhe oolieir 'i8 at the level' Q0, which .ispivoted at 2i the in,v 22 pivoeii zii; 23 to u stationary memo-2.,livoed 'to Ihe leve'il Q0 :le ivoed i6 to a level` ineinloei 27 secured,up in the shaft :ini/l havin the arcuate slot 29, thiouggjh whichexenii. e pin 30 fo aol waiting the zii-m 31, loosel;7 pivoied upoil theehe' 28 and havingr at its upper end the weight Pzuellel to Jdie shaftis disposed die shal' 33, upon which ie disposed the pinion oi) oothedWheei Bei meshing' 'with the pinion o1' coothed Wheel 35, which latiei'nieves in fixed rela-tion wich the ain'i 3l and the eoeentiic cehieclamping nieinhei' 8G, heween which and the opposing eeceni'io cablecleinpiiwg' nieinheif 8'? ecime ed hy i'he pinion 35i may he gripped thesafety oel-ele 6.

The link 3S, pivoed io the `levei Q() el; 39% ie pivoed at Ll() 'to thelever l Secured upon m sind having' vthe arcuate Slot 43,

es the post is :i link Q5 p the she-.ift through which extends e pin @Aconneeted o the :iiin e5, loosel)v pivoted upon le shaft l2 andcari-ying et ite uppe" end Weighl e5. lziohed to the :ziin i5 is tecoenii'io (fehle-engaging @lmnp 4J, oppose@ ivhiih is i siinilui f l i;i8 disposed upon the Sheff; i9

: nd niovuhie with the "oohed Wheel or gear 50i driven hv l'he toothedWheel oi' d Yfih hv opposing' the outa'eii 1 VL 1 1 hulls i3 under sheinhuence p terial, upon which are mounted two elec" Y for exainnle theinotor M Fie'. L7

Vboth the car and the counter ldi'uiii 6?' is secured upon shaft 73 gg iifiie esi force when the shaft l() is rotating. lilou"- ever, additionalWeighting means, 52, may be carried by the lever 20, on eltlici' side ofthe pivot 19, as inay be suitable or desirable. f

The Weight systeiii described constantly opposes the centrifugal torceactii'j upon the fly vballs 13, and thereby operates es a control asregards the upward nioif'ciiieiit olf the sleeve 17 and all the partscontrolled or actuated thereby through the links 2 5 and 38. Y

Surrounding' the governor' sliail't l0 is a helical spring` 53, disposedbetween tli sleeve l? and a collar 54k, which is securer to the shaft l0at any suitable posici-oi longitudinally thereoi". fis indicatei, thecollar 54, with the governor s'ructui'e at rest, as shown in Fig. l, isdisposed at simo distance above the upper end of the spr f 53, with theresult that the soring 5 after predetermined range of upwird e nient oftlie sleeve l coiiies into nient with the collar 54., tl'iereaviercooperates with the Weight systein iii c( oi' the governor, as inopposing' tlie centrifuge, force er; rted upon tlie ily calls Referringto Figs. 2, 3 and el, bei shown mount-ed upon the base l tl 55, of slateor other suitable iiisulatiiioj inaswitch structures 'llie structure Scoinprisesftlie movable c 56 pivoted at 57 and eiig=- jiiig the aryswitch. Contact 58. uniilarly,

l comprises 'the stationswitch structure iu ary contact 59, with whichco-acts the inox# able contact 60 pivoted at Secured upon the shalt isthe cani Gi which corr trols the arni 03".' the switch S pivoted at Asecond cani 63, secured upon 'the shalt similarly controls tlie arm oithe switch b pivoted at 6l.

Referring` now to Fig'. 5, C represents '5 elevator car, to which isattached the main cable (Se driven by any suitable f ing over theslieave or di'urnL 65. L .L 7 .1. a. i, to the cable G4; is bhecouiiieriveigni sii-'u ture lill. rllie sainety cable 3 pas e; t sheavev5, as a'l'oi'esaid, and also over t sheaves 6o, .the cable 6 i'unnsheave 66 is mounted, iii any iieijat tlie bottoni el the el Upon thebottoni oll tlic ce; the rotary drum 6.7, to 'whirl vat GS, one end ollva crible 69 y c; the drum 6?' :uid over idlers 'T0 i the safety eabsecured at 2 'to posee between the levers .f5x o im '.(f. 6., and teraiii ati' i i i disposed on opoosit of a rbar 78 paralleling the pat-liof travel of the car C and counterweiglit W. ii second nut 7e andcoacting structure is provided along with a second Klf"i'all 73.

Siinilar structure is provie'ied upoii the countervveight structure TWioi' co-acting with similar rails 73, 78 extending parallel to the pathof traif'el or tlie coun weight. Referring to Fig. 7, T9 and SO indicatesupply circuit conductors 'foi' upplyiiig current to an electric motorfor driving' tlie iiiain cable (le and attached and (zo-acting parts. twill be understood that the inotoi' iiiay be oi' either direct oralternating current type. ln the example illustrated, the

Vinotor lil is or ene direct current type hav armature il and shuntVviield windings l?, 1 il relay, liavii'igg; 'the dingconnected acrossthe supply conductors T9 a id 80 through the aforesaid switch ,55, isprovided with the inoyable Contact ineniber Si?, which, when the'Winding is energized when the switch S is close l, bridgesthe-'contacts S3, thereby bringt" into circi with one section lll of thes1 i t y eine ing a resistance practir ly equal to the rcsistsii .c oi"the shunt d :'-Jindingl When switch S opens, f ay is energized and thecontact ine l n K i. .i o W 1 ano. bridges conracts oo, 8o, thereby oreing` t ie n circuit through the resi 3e. an iii'iirggiifigg` the .tiel-lwin-dino' F1 in place, ,'i'liercby t1 circuit lli is strengthened, cau

ne field o the motor sing` it to rend to run at lower speed.V

rlllie armature supply conductors tact member 8G vlieiiV relay Wliicl isis when tlie c whereby the Windingx S3 is e i the supply conductors 9,of", switchy S1 opens, *be

[Jl-JJ thereby completely hut the inotoi' lil, which tli liver power.

lt Will be understood that the controls illustrated in Fig'. T are fnaddition to the i usual starting and sto'ugj ingr controls 'lor the beiiiiier nod i inet-or be e' l' n mi v-l in wiiicli else aA ilogousoniielli i i; sans qui Ami* I ne opera-ion is i s 'follow ums Ay u .L Aagainst io- 'which the Weight system alone is actine motor occurs at amore deinitely determinable speed, since with the spring in actionV thegovernor at the higher speeds isino longer unstable, but is stable. Andfor still. higher speeds the governor continues to be stable, and mayaccordingly at substantially dolinite higher weed into action one ormore oi' the safety cable grips or safety device releases. Such controlat substantially definite speeds has been di'l'hcult, it not impossible,with governor structures previously employed, so far as l am aware. Byemploying only the Weight system control for the governor mechanism forthe lower speed range, that range .is of suilicient extent readily topermit control of the field switch or other means for slowing thedriving motor, any one of quite a number of different speeds. For higherspeeds, when the spring or resilient system comes into operation, ad-

ditional controls are possible, and With a nic-ety of determination asto speed Which is not possible with governor mechanism controlled onlyby a weight system, which at the higher speeds tends to oscillate or isunstable. ln accordance -with my invention, the spring or resilientcontrol stabilizesthe governor, especially in the highest Vspeed range.l

By adjustment of, the collar or abutment to diiilercnt positions uponthe governor' shalt l0 is determined the speed at which the springbegins to co-actwith the weight system.

rllhough my invention is not limited thereto, it is preferred that atleast the lirst control, as the-slowing of the driving motor, shall beeiiiected during 'the speed range in upon theV governor, and thereafter,'lior the speed range Within which both the Weight system and spring'co-act in controlling the governor, the remaining controls are effected.

lihat l claim is: Y

l. 1Elevator control mechanism compristem controlling said governorthroughout a low speed range, a control device controlled by said n^fable member, a spring co.- acting with said Weight system incontrollling` said governor in a higher speed range, and a second control devicecontrolled by said movable member Within said higher speed range.

2. Elevator control mechanism comprising a governor having a membermovable in response to changes ot speed, a Weight system controllingsaid governor throughout a losv speed range, a control device controlledby said movable member, a spring co-acting with said Weight system incontrolling said governor in a higherspeed range, and a plurality orcontrol devices a governor having a member movable inV nimeer controlledby said movable member and brought into operation in` succession in saidhigher speed range.

3. VElevator control mechanism Vcomprising a governor having a membermovable in response to changes otl speed, a Weight system controllingsaid governor, ay resilient system controlling saidgovernor for speedsin excess ot' a predetermined speed, ,caroperating motor, and motorcontrol switches controlled in succession by said movable member'uponattainment of different speeds, one of saidsivitches beingl actuatedalter said resilient system has been rendered etifective. Y Y Y 4.Elevator control mechanism comprising a governor having a member movablein response to changes oin4 speed, a Weight system controlling` saidgovernor, a resilient system controllingl said governor :tor speeds inexcess of ay predetermined speed, av caroperating motor, motor controlswitches controlled in succession by said movable member upon attainmentof different speeds, and a safety device controlled by said movablemember upon attainment of asaid eX- cess speed.

5. Elevator control mechanism comprising a governor having a membermovable in Vresponse to changes otspeed, a Wei-eht system controllingsaid governor, a resilient system controlling said governor iior 'speedsin excess ol? a predetermined speed, a caroperating motor, motor controlswitches ccntrolled'in .succession by said movable memresponse tochanges otspeed, a Weight sy,-

tem controlling, saidhgovernor th oiiyzh loiv speed range,V a springco-acting'vvith said Weight system in controlling said governor in ahigher speed range,a car-operating motor, a motor control switchcontrolled bylsaid movable member in said lower speed range, and asecond motor control switch controlled by said movable member inthehigher speed range. y Y f Y 7. Elevator Control mechanism comprising agovernor having a member movable in response to changes of speed, a.eight system controlling said. governor through a low speed range, aspring (io-acting with said Weight system controlling id governor in ahigher speed range, a car-operatmotor, a motor control switch controlledby said movable member in said lower speed range, a second motor controlswitch controlled by said movable member in the higher speedrange, and asafety device brought into action by said movable member after controlot said second motor control switch.

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S. Elevator mechanism comprising a governor mornin` a member movable inresponse 'to charmes speed, a weight system controlling' said overnorthrough a low speed range, a spi-ingr co-actingl with said weight tsystem in controlling said governor in a higher speed range, acar-operating motor` a motor control switch controlled by said movablemei-:uber in said lower speed ranfrm a second motor control switchcontrolled by said movable member in the higher speed range and saitetydevices for the car and its counterweight brought into action y saidmovable men ber after control ot said second motor control switch.

9. Elevator control mechanism comprising a satety cable moving with theelevator car. centrifugal governor driven by said cable, a weight systemcontrolling said governor in a lov: speed range7 a spring coming intoaction in a higher speed range to control said governor, and controldevices brought into action successively by said governor tor speedslying' within said low and higher speed ranges.

l0. The combination with an elevator car and a counterweight therefor,or guide rails ttor the car and the counterweight clamps carried by thecar and the counterweic'ht. respectively. and adapted to `grip therails, a safety cable normally movable synchronously with the car,connections between said cable and the clamps, and means whereby upon atoo rapid movement et the car in one direction the movement ot saidcable is retarded to etvect actuation ot the clamps which are attachedto the counterweieht and whereby upon too rapid movement ot the car inthe opposite direction the clamps carried by the car are actuated.

l1. The combination with an elevator and an electric motor for drivingthe same, ot control mechanism comprisingl a governor having a membermovable in response to chauffes ot speed and actuated upon movement otthe elevator. a weight system controllingT said governor, a resilientIsystem controlling` the said movable member through but a portion ot itspath ot movement, and a control device for the motor actuated by thesaid movable member after said resilient system has been renderedetfective.

l2. The combination with an elevator and au electric motor for drivingrthe same, ot control meelenisni comprisinpj a grrrvcruor having a membermovable in response to changes oit speed and actuated upon movenent ofthe elevator, a. weight system controlling; said governon a resilientsystem. controlling the said movable member through but a portion oitits path et movementn and a circuit interruptiosr device tor the motoractuated by the said movable member after said resilient system has beenrendered effective.

i3, Elevator control mechanism comprising ay centrifugal governor, amember :novable by said governor in response to changes oi" speed, anoperatingmotor, a motor control swtch actuated by said movable member ata predetermined point in its path ot movement, and a resilient systemtor controlling; said governor only at speeds in eX- cess et apredetermined rate7 whereby the rate of speed of the governor at whichthe said switch will be actuated may be definitely fixed.

la. Elevator control mechanism comprisingr a centrifugal governor, amember movable by said governor in response to changes et speed.r anoperatingr motor, two motor control switches respectively actuated bysaid movable member at predetermined points in its path oit movement, totirst reduce the speed or the motor and to then interrupt the circuittherethrou eha and resilient Yter controlling' said governor only atspeeds in excess ot a predetermined rate.; whereby the rate of speed atwhich one ot said switches will be operated lmay be definitely fixed.

l5. Elevator control mechanism comprisingr a centrifugal governor,member mevable by said governor in response to changes or speed, anoperating; motor., a motor control switch actuated by said movablemember at predetermined peint in its path ot movement, a resilientsystem tor controlling said governor at only speeds in excess et apredetermined rate, and means for adjust-inte; the position ot saidsystem relatively to the said movable member.

16. The combination with an elevator and an electric motor tor driving;the same.y ot control mechanism comprisiimr a governor having a membermovable in response to changes of speed and actuated upon movement otthe elevaton a control device act ated b v said movable member duringcomparatively low speed range, tor reducin the speed ot the motor, acontrol device tor interruptiim` the circuit through the motor andactuated by the sai r'iovr-.ble member during movement thereov a' hipjhs d range.v and a resilient system tor controllingr` the said movablemember only during; its movement in said high speed range.

ln testimony wl'lereot l have hereunto hired my signature this 26 day ot@pril llO

